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1/** @file\r
2\r
3 Internal functions to operate Working Block Space.\r
4\r
5Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
6This program and the accompanying materials\r
7are licensed and made available under the terms and conditions of the BSD License\r
8which accompanies this distribution. The full text of the license may be found at\r
9http://opensource.org/licenses/bsd-license.php\r
10\r
11THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
12WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
13\r
14**/\r
15\r
16\r
17#include "FaultTolerantWrite.h"\r
18\r
19EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER mWorkingBlockHeader = {ZERO_GUID, 0, 0, 0, 0, {0, 0, 0}, 0};\r
20\r
21/**\r
22 Initialize a local work space header.\r
23\r
24 Since Signature and WriteQueueSize have been known, Crc can be calculated out,\r
25 then the work space header will be fixed.\r
26**/\r
27VOID\r
28InitializeLocalWorkSpaceHeader (\r
29 VOID\r
30 )\r
31{\r
32 EFI_STATUS Status;\r
33\r
34 //\r
35 // Check signature with gEdkiiWorkingBlockSignatureGuid.\r
36 //\r
37 if (CompareGuid (&gEdkiiWorkingBlockSignatureGuid, &mWorkingBlockHeader.Signature)) {\r
38 //\r
39 // The local work space header has been initialized.\r
40 //\r
41 return;\r
42 }\r
43\r
44 SetMem (\r
45 &mWorkingBlockHeader,\r
46 sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r
47 FTW_ERASED_BYTE\r
48 );\r
49\r
50 //\r
51 // Here using gEdkiiWorkingBlockSignatureGuid as the signature.\r
52 //\r
53 CopyMem (\r
54 &mWorkingBlockHeader.Signature,\r
55 &gEdkiiWorkingBlockSignatureGuid,\r
56 sizeof (EFI_GUID)\r
57 );\r
58 mWorkingBlockHeader.WriteQueueSize = PcdGet32 (PcdFlashNvStorageFtwWorkingSize) - sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER);\r
59\r
60 //\r
61 // Crc is calculated with all the fields except Crc and STATE, so leave them as FTW_ERASED_BYTE.\r
62 //\r
63\r
64 //\r
65 // Calculate the Crc of woking block header\r
66 //\r
67 Status = gBS->CalculateCrc32 (\r
68 &mWorkingBlockHeader,\r
69 sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r
70 &mWorkingBlockHeader.Crc\r
71 );\r
72 ASSERT_EFI_ERROR (Status);\r
73\r
74 mWorkingBlockHeader.WorkingBlockValid = FTW_VALID_STATE;\r
75 mWorkingBlockHeader.WorkingBlockInvalid = FTW_INVALID_STATE;\r
76}\r
77\r
78/**\r
79 Check to see if it is a valid work space.\r
80\r
81\r
82 @param WorkingHeader Pointer of working block header\r
83\r
84 @retval TRUE The work space is valid.\r
85 @retval FALSE The work space is invalid.\r
86\r
87**/\r
88BOOLEAN\r
89IsValidWorkSpace (\r
90 IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r
91 )\r
92{\r
93 if (WorkingHeader == NULL) {\r
94 return FALSE;\r
95 }\r
96\r
97 if (CompareMem (WorkingHeader, &mWorkingBlockHeader, sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER)) == 0) {\r
98 return TRUE;\r
99 }\r
100\r
101 DEBUG ((EFI_D_INFO, "Ftw: Work block header check mismatch\n"));\r
102 return FALSE;\r
103}\r
104\r
105/**\r
106 Initialize a work space when there is no work space.\r
107\r
108 @param WorkingHeader Pointer of working block header\r
109\r
110 @retval EFI_SUCCESS The function completed successfully\r
111 @retval EFI_ABORTED The function could not complete successfully.\r
112\r
113**/\r
114EFI_STATUS\r
115InitWorkSpaceHeader (\r
116 IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r
117 )\r
118{\r
119 if (WorkingHeader == NULL) {\r
120 return EFI_INVALID_PARAMETER;\r
121 }\r
122\r
123 CopyMem (WorkingHeader, &mWorkingBlockHeader, sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER));\r
124\r
125 return EFI_SUCCESS;\r
126}\r
127\r
128/**\r
129 Read work space data from work block or spare block.\r
130\r
131 @param FvBlock FVB Protocol interface to access the block.\r
132 @param BlockSize The size of the block.\r
133 @param Lba Lba of the block.\r
134 @param Offset The offset within the block.\r
135 @param Length The number of bytes to read from the block.\r
136 @param Buffer The data is read.\r
137\r
138 @retval EFI_SUCCESS The function completed successfully.\r
139 @retval EFI_ABORTED The function could not complete successfully.\r
140\r
141**/\r
142EFI_STATUS\r
143ReadWorkSpaceData (\r
144 IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r
145 IN UINTN BlockSize,\r
146 IN EFI_LBA Lba,\r
147 IN UINTN Offset,\r
148 IN UINTN Length,\r
149 OUT UINT8 *Buffer\r
150 )\r
151{\r
152 EFI_STATUS Status;\r
153 UINT8 *Ptr;\r
154 UINTN MyLength;\r
155\r
156 //\r
157 // Calculate the real Offset and Lba to write.\r
158 //\r
159 while (Offset >= BlockSize) {\r
160 Offset -= BlockSize;\r
161 Lba++;\r
162 }\r
163\r
164 Ptr = Buffer;\r
165 while (Length > 0) {\r
166 if ((Offset + Length) > BlockSize) {\r
167 MyLength = BlockSize - Offset;\r
168 } else {\r
169 MyLength = Length;\r
170 }\r
171\r
172 Status = FvBlock->Read (\r
173 FvBlock,\r
174 Lba,\r
175 Offset,\r
176 &MyLength,\r
177 Ptr\r
178 );\r
179 if (EFI_ERROR (Status)) {\r
180 return EFI_ABORTED;\r
181 }\r
182 Offset = 0;\r
183 Length -= MyLength;\r
184 Ptr += MyLength;\r
185 Lba++;\r
186 }\r
187\r
188 return EFI_SUCCESS;\r
189}\r
190\r
191/**\r
192 Write work space data to work block.\r
193\r
194 @param FvBlock FVB Protocol interface to access the block.\r
195 @param BlockSize The size of the block.\r
196 @param Lba Lba of the block.\r
197 @param Offset The offset within the block to place the data.\r
198 @param Length The number of bytes to write to the block.\r
199 @param Buffer The data to write.\r
200\r
201 @retval EFI_SUCCESS The function completed successfully.\r
202 @retval EFI_ABORTED The function could not complete successfully.\r
203\r
204**/\r
205EFI_STATUS\r
206WriteWorkSpaceData (\r
207 IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r
208 IN UINTN BlockSize,\r
209 IN EFI_LBA Lba,\r
210 IN UINTN Offset,\r
211 IN UINTN Length,\r
212 IN UINT8 *Buffer\r
213 )\r
214{\r
215 EFI_STATUS Status;\r
216 UINT8 *Ptr;\r
217 UINTN MyLength;\r
218\r
219 //\r
220 // Calculate the real Offset and Lba to write.\r
221 //\r
222 while (Offset >= BlockSize) {\r
223 Offset -= BlockSize;\r
224 Lba++;\r
225 }\r
226\r
227 Ptr = Buffer;\r
228 while (Length > 0) {\r
229 if ((Offset + Length) > BlockSize) {\r
230 MyLength = BlockSize - Offset;\r
231 } else {\r
232 MyLength = Length;\r
233 }\r
234\r
235 Status = FvBlock->Write (\r
236 FvBlock,\r
237 Lba,\r
238 Offset,\r
239 &MyLength,\r
240 Ptr\r
241 );\r
242 if (EFI_ERROR (Status)) {\r
243 return EFI_ABORTED;\r
244 }\r
245 Offset = 0;\r
246 Length -= MyLength;\r
247 Ptr += MyLength;\r
248 Lba++;\r
249 }\r
250 return EFI_SUCCESS;\r
251}\r
252\r
253/**\r
254 Read from working block to refresh the work space in memory.\r
255\r
256 @param FtwDevice Point to private data of FTW driver\r
257\r
258 @retval EFI_SUCCESS The function completed successfully\r
259 @retval EFI_ABORTED The function could not complete successfully.\r
260\r
261**/\r
262EFI_STATUS\r
263WorkSpaceRefresh (\r
264 IN EFI_FTW_DEVICE *FtwDevice\r
265 )\r
266{\r
267 EFI_STATUS Status;\r
268 UINTN RemainingSpaceSize;\r
269\r
270 //\r
271 // Initialize WorkSpace as FTW_ERASED_BYTE\r
272 //\r
273 SetMem (\r
274 FtwDevice->FtwWorkSpace,\r
275 FtwDevice->FtwWorkSpaceSize,\r
276 FTW_ERASED_BYTE\r
277 );\r
278\r
279 //\r
280 // Read from working block\r
281 //\r
282 Status = ReadWorkSpaceData (\r
283 FtwDevice->FtwFvBlock,\r
284 FtwDevice->WorkBlockSize,\r
285 FtwDevice->FtwWorkSpaceLba,\r
286 FtwDevice->FtwWorkSpaceBase,\r
287 FtwDevice->FtwWorkSpaceSize,\r
288 FtwDevice->FtwWorkSpace\r
289 );\r
290 if (EFI_ERROR (Status)) {\r
291 return EFI_ABORTED;\r
292 }\r
293 //\r
294 // Refresh the FtwLastWriteHeader\r
295 //\r
296 Status = FtwGetLastWriteHeader (\r
297 FtwDevice->FtwWorkSpaceHeader,\r
298 FtwDevice->FtwWorkSpaceSize,\r
299 &FtwDevice->FtwLastWriteHeader\r
300 );\r
301 RemainingSpaceSize = FtwDevice->FtwWorkSpaceSize - ((UINTN) FtwDevice->FtwLastWriteHeader - (UINTN) FtwDevice->FtwWorkSpace);\r
302 DEBUG ((EFI_D_INFO, "Ftw: Remaining work space size - %x\n", RemainingSpaceSize));\r
303 //\r
304 // If FtwGetLastWriteHeader() returns error, or the remaining space size is even not enough to contain\r
305 // one EFI_FAULT_TOLERANT_WRITE_HEADER + one EFI_FAULT_TOLERANT_WRITE_RECORD(It will cause that the header\r
306 // pointed by FtwDevice->FtwLastWriteHeader or record pointed by FtwDevice->FtwLastWriteRecord may contain invalid data),\r
307 // it needs to reclaim work space.\r
308 //\r
309 if (EFI_ERROR (Status) || RemainingSpaceSize < sizeof (EFI_FAULT_TOLERANT_WRITE_HEADER) + sizeof (EFI_FAULT_TOLERANT_WRITE_RECORD)) {\r
310 //\r
311 // reclaim work space in working block.\r
312 //\r
313 Status = FtwReclaimWorkSpace (FtwDevice, TRUE);\r
314 if (EFI_ERROR (Status)) {\r
315 DEBUG ((EFI_D_ERROR, "Ftw: Reclaim workspace - %r\n", Status));\r
316 return EFI_ABORTED;\r
317 }\r
318 //\r
319 // Read from working block again\r
320 //\r
321 Status = ReadWorkSpaceData (\r
322 FtwDevice->FtwFvBlock,\r
323 FtwDevice->WorkBlockSize,\r
324 FtwDevice->FtwWorkSpaceLba,\r
325 FtwDevice->FtwWorkSpaceBase,\r
326 FtwDevice->FtwWorkSpaceSize,\r
327 FtwDevice->FtwWorkSpace\r
328 );\r
329 if (EFI_ERROR (Status)) {\r
330 return EFI_ABORTED;\r
331 }\r
332\r
333 Status = FtwGetLastWriteHeader (\r
334 FtwDevice->FtwWorkSpaceHeader,\r
335 FtwDevice->FtwWorkSpaceSize,\r
336 &FtwDevice->FtwLastWriteHeader\r
337 );\r
338 if (EFI_ERROR (Status)) {\r
339 return EFI_ABORTED;\r
340 }\r
341 }\r
342 //\r
343 // Refresh the FtwLastWriteRecord\r
344 //\r
345 Status = FtwGetLastWriteRecord (\r
346 FtwDevice->FtwLastWriteHeader,\r
347 &FtwDevice->FtwLastWriteRecord\r
348 );\r
349 if (EFI_ERROR (Status)) {\r
350 return EFI_ABORTED;\r
351 }\r
352\r
353 return EFI_SUCCESS;\r
354}\r
355\r
356/**\r
357 Reclaim the work space on the working block.\r
358\r
359 @param FtwDevice Point to private data of FTW driver\r
360 @param PreserveRecord Whether to preserve the working record is needed\r
361\r
362 @retval EFI_SUCCESS The function completed successfully\r
363 @retval EFI_OUT_OF_RESOURCES Allocate memory error\r
364 @retval EFI_ABORTED The function could not complete successfully\r
365\r
366**/\r
367EFI_STATUS\r
368FtwReclaimWorkSpace (\r
369 IN EFI_FTW_DEVICE *FtwDevice,\r
370 IN BOOLEAN PreserveRecord\r
371 )\r
372{\r
373 EFI_STATUS Status;\r
374 UINTN Length;\r
375 EFI_FAULT_TOLERANT_WRITE_HEADER *Header;\r
376 UINT8 *TempBuffer;\r
377 UINTN TempBufferSize;\r
378 UINTN SpareBufferSize;\r
379 UINT8 *SpareBuffer;\r
380 EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingBlockHeader;\r
381 UINTN Index;\r
382 UINT8 *Ptr;\r
383 EFI_LBA WorkSpaceLbaOffset;\r
384\r
385 DEBUG ((EFI_D_INFO, "Ftw: start to reclaim work space\n"));\r
386\r
387 WorkSpaceLbaOffset = FtwDevice->FtwWorkSpaceLba - FtwDevice->FtwWorkBlockLba;\r
388\r
389 //\r
390 // Read all original data from working block to a memory buffer\r
391 //\r
392 TempBufferSize = FtwDevice->NumberOfWorkBlock * FtwDevice->WorkBlockSize;\r
393 TempBuffer = AllocateZeroPool (TempBufferSize);\r
394 if (TempBuffer == NULL) {\r
395 return EFI_OUT_OF_RESOURCES;\r
396 }\r
397\r
398 Ptr = TempBuffer;\r
399 for (Index = 0; Index < FtwDevice->NumberOfWorkBlock; Index += 1) {\r
400 Length = FtwDevice->WorkBlockSize;\r
401 Status = FtwDevice->FtwFvBlock->Read (\r
402 FtwDevice->FtwFvBlock,\r
403 FtwDevice->FtwWorkBlockLba + Index,\r
404 0,\r
405 &Length,\r
406 Ptr\r
407 );\r
408 if (EFI_ERROR (Status)) {\r
409 FreePool (TempBuffer);\r
410 return EFI_ABORTED;\r
411 }\r
412\r
413 Ptr += Length;\r
414 }\r
415 //\r
416 // Clean up the workspace, remove all the completed records.\r
417 //\r
418 Ptr = TempBuffer +\r
419 (UINTN) WorkSpaceLbaOffset * FtwDevice->WorkBlockSize +\r
420 FtwDevice->FtwWorkSpaceBase;\r
421\r
422 //\r
423 // Clear the content of buffer that will save the new work space data\r
424 //\r
425 SetMem (Ptr, FtwDevice->FtwWorkSpaceSize, FTW_ERASED_BYTE);\r
426\r
427 //\r
428 // Copy EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER to buffer\r
429 //\r
430 CopyMem (\r
431 Ptr,\r
432 FtwDevice->FtwWorkSpaceHeader,\r
433 sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER)\r
434 );\r
435 if (PreserveRecord) {\r
436 //\r
437 // Get the last record following the header,\r
438 //\r
439 Status = FtwGetLastWriteHeader (\r
440 FtwDevice->FtwWorkSpaceHeader,\r
441 FtwDevice->FtwWorkSpaceSize,\r
442 &FtwDevice->FtwLastWriteHeader\r
443 );\r
444 Header = FtwDevice->FtwLastWriteHeader;\r
445 if (!EFI_ERROR (Status) && (Header != NULL) && (Header->Complete != FTW_VALID_STATE) && (Header->HeaderAllocated == FTW_VALID_STATE)) {\r
446 CopyMem (\r
447 Ptr + sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r
448 FtwDevice->FtwLastWriteHeader,\r
449 FTW_WRITE_TOTAL_SIZE (Header->NumberOfWrites, Header->PrivateDataSize)\r
450 );\r
451 }\r
452 }\r
453\r
454 CopyMem (\r
455 FtwDevice->FtwWorkSpace,\r
456 Ptr,\r
457 FtwDevice->FtwWorkSpaceSize\r
458 );\r
459\r
460 FtwGetLastWriteHeader (\r
461 FtwDevice->FtwWorkSpaceHeader,\r
462 FtwDevice->FtwWorkSpaceSize,\r
463 &FtwDevice->FtwLastWriteHeader\r
464 );\r
465\r
466 FtwGetLastWriteRecord (\r
467 FtwDevice->FtwLastWriteHeader,\r
468 &FtwDevice->FtwLastWriteRecord\r
469 );\r
470\r
471 //\r
472 // Set the WorkingBlockValid and WorkingBlockInvalid as INVALID\r
473 //\r
474 WorkingBlockHeader = (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *) (TempBuffer +\r
475 (UINTN) WorkSpaceLbaOffset * FtwDevice->WorkBlockSize +\r
476 FtwDevice->FtwWorkSpaceBase);\r
477 WorkingBlockHeader->WorkingBlockValid = FTW_INVALID_STATE;\r
478 WorkingBlockHeader->WorkingBlockInvalid = FTW_INVALID_STATE;\r
479\r
480 //\r
481 // Try to keep the content of spare block\r
482 // Save spare block into a spare backup memory buffer (Sparebuffer)\r
483 //\r
484 SpareBufferSize = FtwDevice->SpareAreaLength;\r
485 SpareBuffer = AllocatePool (SpareBufferSize);\r
486 if (SpareBuffer == NULL) {\r
487 FreePool (TempBuffer);\r
488 return EFI_OUT_OF_RESOURCES;\r
489 }\r
490\r
491 Ptr = SpareBuffer;\r
492 for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r
493 Length = FtwDevice->SpareBlockSize;\r
494 Status = FtwDevice->FtwBackupFvb->Read (\r
495 FtwDevice->FtwBackupFvb,\r
496 FtwDevice->FtwSpareLba + Index,\r
497 0,\r
498 &Length,\r
499 Ptr\r
500 );\r
501 if (EFI_ERROR (Status)) {\r
502 FreePool (TempBuffer);\r
503 FreePool (SpareBuffer);\r
504 return EFI_ABORTED;\r
505 }\r
506\r
507 Ptr += Length;\r
508 }\r
509 //\r
510 // Write the memory buffer to spare block\r
511 //\r
512 Status = FtwEraseSpareBlock (FtwDevice);\r
513 if (EFI_ERROR (Status)) {\r
514 FreePool (TempBuffer);\r
515 FreePool (SpareBuffer);\r
516 return EFI_ABORTED;\r
517 }\r
518 Ptr = TempBuffer;\r
519 for (Index = 0; TempBufferSize > 0; Index += 1) {\r
520 if (TempBufferSize > FtwDevice->SpareBlockSize) {\r
521 Length = FtwDevice->SpareBlockSize;\r
522 } else {\r
523 Length = TempBufferSize;\r
524 }\r
525 Status = FtwDevice->FtwBackupFvb->Write (\r
526 FtwDevice->FtwBackupFvb,\r
527 FtwDevice->FtwSpareLba + Index,\r
528 0,\r
529 &Length,\r
530 Ptr\r
531 );\r
532 if (EFI_ERROR (Status)) {\r
533 FreePool (TempBuffer);\r
534 FreePool (SpareBuffer);\r
535 return EFI_ABORTED;\r
536 }\r
537\r
538 Ptr += Length;\r
539 TempBufferSize -= Length;\r
540 }\r
541 //\r
542 // Free TempBuffer\r
543 //\r
544 FreePool (TempBuffer);\r
545\r
546 //\r
547 // Set the WorkingBlockValid in spare block\r
548 //\r
549 Status = FtwUpdateFvState (\r
550 FtwDevice->FtwBackupFvb,\r
551 FtwDevice->SpareBlockSize,\r
552 FtwDevice->FtwSpareLba + FtwDevice->FtwWorkSpaceLbaInSpare,\r
553 FtwDevice->FtwWorkSpaceBaseInSpare + sizeof (EFI_GUID) + sizeof (UINT32),\r
554 WORKING_BLOCK_VALID\r
555 );\r
556 if (EFI_ERROR (Status)) {\r
557 FreePool (SpareBuffer);\r
558 return EFI_ABORTED;\r
559 }\r
560 //\r
561 // Before erase the working block, set WorkingBlockInvalid in working block.\r
562 //\r
563 // Offset = OFFSET_OF(EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER,\r
564 // WorkingBlockInvalid);\r
565 //\r
566 Status = FtwUpdateFvState (\r
567 FtwDevice->FtwFvBlock,\r
568 FtwDevice->WorkBlockSize,\r
569 FtwDevice->FtwWorkSpaceLba,\r
570 FtwDevice->FtwWorkSpaceBase + sizeof (EFI_GUID) + sizeof (UINT32),\r
571 WORKING_BLOCK_INVALID\r
572 );\r
573 if (EFI_ERROR (Status)) {\r
574 FreePool (SpareBuffer);\r
575 return EFI_ABORTED;\r
576 }\r
577\r
578 FtwDevice->FtwWorkSpaceHeader->WorkingBlockInvalid = FTW_VALID_STATE;\r
579\r
580 //\r
581 // Write the spare block to working block\r
582 //\r
583 Status = FlushSpareBlockToWorkingBlock (FtwDevice);\r
584 if (EFI_ERROR (Status)) {\r
585 FreePool (SpareBuffer);\r
586 return Status;\r
587 }\r
588 //\r
589 // Restore spare backup buffer into spare block , if no failure happened during FtwWrite.\r
590 //\r
591 Status = FtwEraseSpareBlock (FtwDevice);\r
592 if (EFI_ERROR (Status)) {\r
593 FreePool (SpareBuffer);\r
594 return EFI_ABORTED;\r
595 }\r
596 Ptr = SpareBuffer;\r
597 for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r
598 Length = FtwDevice->SpareBlockSize;\r
599 Status = FtwDevice->FtwBackupFvb->Write (\r
600 FtwDevice->FtwBackupFvb,\r
601 FtwDevice->FtwSpareLba + Index,\r
602 0,\r
603 &Length,\r
604 Ptr\r
605 );\r
606 if (EFI_ERROR (Status)) {\r
607 FreePool (SpareBuffer);\r
608 return EFI_ABORTED;\r
609 }\r
610\r
611 Ptr += Length;\r
612 }\r
613\r
614 FreePool (SpareBuffer);\r
615\r
616 DEBUG ((EFI_D_INFO, "Ftw: reclaim work space successfully\n"));\r
617\r
618 return EFI_SUCCESS;\r
619}\r
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